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Improved PIM Digital Driver with Dead-Zone Compensation for a Stepping Motor
Takahiro Okada,Noriyuki Hori 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
The present paper is concerned with an improvement of the so-called Plant-Input-Mapping (PIM) discretization??as applied to an analog controller that is used in a high-performance commercial driver for stepping motors. The controller employs a linearizing compensator to cancel out the effect of dead-zone nonlinearity that exists in a pulse-width-modulation circuit of the driver, which has been one of the major limiting factors in the design of linear PIM digital drivers. The experiments show that the proposed digital driver has the performance that is closer to that of the analog one, even at the low sampling rate of 4kHz, than the existing PIM driver which approximates the dead-zone as a simple gain.
Yuki Tokutsu,Wakako Umene-Nakano,Takahiro Shinkai,Reiji Yoshimura,Tatsuya Okamoto,Asuka Katsuki,Hikaru Hori,Atsuko Ikenouchi-Sugita,Kenji Hayashi,Kiyokazu Atake,Jun Nakamura 대한정신약물학회 2013 CLINICAL PSYCHOPHARMACOLOGY AND NEUROSCIENCE Vol.11 No.1
Objective: Electroconvulsive therapy (ECT) has proven to be effective in treatment-resistant depression (TRD). In recent reports,70% to 90% of patients with TRD responded to ECT. However, post-ECT relapse is a significant problem. There are no studies investigating risk factors associated with reintroducing ECT in depressive patients after remission previously achieved with former ECT. The aim of the present study is to examine such risk factors using a sample of TRD patients. Methods: We conducted a chart review to examine patient outcomes and adverse events over short- and long-term periods. Forty-two patients met the criteria for major depressive disorder. Results: The response rate was 85.7% (36/42). There were no significant differences in the baseline characteristics of patients exhibiting remission, response or non-response. The rate of adverse events was 21.4% (9/42). Among 34 patients who were available for follow-up, 18 patients relapsed (relapse rate, 52.9%), and 6 patients were reintroduced to ECT. The patients’ age and age of onset were significantly higher in the re-ECT group than non re-ECT group. Conclusion: Our results suggest that older age and older age of onset might be considered for requirement of re-ECT after remission previously achieved with former ECT.
Sakisuka Ryo,Morita Takumi,Tanaka Yuya,Hori Shinya,Shimo Daisuke,Hashimura Naoki,Kuroyama Takahiro,Ueno Yasushi 대한신경중재치료의학회 2024 Neurointervention Vol.19 No.1
Vertebral artery stump syndrome (VASS) is a rare condition that can cause posterior circulation ischemic stroke due to occlusion of the ipsilateral vertebral artery (VA) orifice, resulting in blood flow stagnation and embolus formation. Although there is no established treatment for this condition, we observed 3 cases of VASS out of 326 acute ischemic stroke cases at a single institution from April 2021 to October 2022. Despite the best possible antithrombotic treatment, all 3 patients had recurrent ischemic strokes. One patient underwent drug-eluting stenting of the VA orifice to relieve occlusive flow. The other 2 patients received coil embolization, which resulted in the disappearance of their culprit collateral flow. None of the patients had recurrent ischemic strokes after endovascular intervention. Based on our observations, stenting and coil embolization are effective methods for preventing future recurrences of VASS.
Inter-professional and inter-departmental alcoholism rehabilitation program
Masahiro Kikuchi,Naomi Matsutani,Ryota Ishihara,Masako Sugihara,Yuuki Mizuno,Chiyo Chiba,Takahiro Ohta,Eri Yamada,Sota Oguro,Yasuko Sato,Hiroki Bessho,Yoshinori Horie 대한간학회 2020 Clinical and Molecular Hepatology(대한간학회지) Vol.26 No.4
A 3-month alcoholism rehabilitation program at psychiatric hospitals is common in Japan for patients with alcohol use disorder (AUD). However, many AUD patients are often hospitalized for the treatment of digestive disorders due to alcohol-related liver diseases and pancreatitis. In this sense, AUD patients need to be better supported by professionals and departments in general hospitals. Here we analyzed the problems in alcohol-related medical care in Japan and examined the measures to be taken at general hospitals.